linux-kernel - [PATCH 1/4] f2fs: fix to clear private data in page

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Message-ID: <572228AC.30109@kernel.org>
Date:	Thu, 28 Apr 2016 23:13:48 +0800
From:	Chao Yu <chao@...nel.org>
To:	Jaegeuk Kim <jaegeuk@...nel.org>
Cc:	linux-f2fs-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] f2fs: fix to clear private data in page

From: Chao Yu <yuchao0@...wei.com>

Private data in page should be removed during ->releasepage or
->invalidatepage, otherwise garbage data would be remained in that page.

Signed-off-by: Chao Yu <yuchao0@...wei.com>
---
 fs/f2fs/data.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 38ce5d6..888f178 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1723,6 +1723,7 @@ void f2fs_invalidate_page(struct page *page, unsigned int
offset,
 	if (IS_ATOMIC_WRITTEN_PAGE(page))
 		return;

+	set_page_private(page, 0);
 	ClearPagePrivate(page);
 }

@@ -1736,6 +1737,7 @@ int f2fs_release_page(struct page *page, gfp_t wait)
 	if (IS_ATOMIC_WRITTEN_PAGE(page))
 		return 0;

+	set_page_private(page, 0);
 	ClearPagePrivate(page);
 	return 1;
 }
-- 
2.7.2